Design-making device



March 26, 1929- s. v. DAWSON ET AL 1,706,993

DESIGN MAKING DEVICE Filed July 20, 1925 2 Sheets-Sheet 1 I March 9 s v. DAWSON ET AL 1,706,998

DESIGN MAKING DEVICE Filed July 20, 1925 2 Sheets-Sheet 2 1% g ij y Patented Mar. 26, 1929.

UNITED STATES PATENT OFFICE.

STUART V. DAWSON, JOHN GILBERT WILKINS, AND EDWARD H. DAWSON, OF CHICAGO, ILLINOIS;

DESIGN-MAKING DEVICE.

Application filed July 20,

to provide a'design making device which. will make a symmetrical design from either a symmetrical or unsymmetrical element.

It is also an object of this invention to provide a design making device which may be adjusted to make a plurality of symmetrical combinations from a given unitary symmetrical or unsymmetrical element.

Other and further important objects of this invention will be apparent from the disclosures in the specification and the accompanymg drawings.

This invention (in a preferred form) is illustrated in .the drawings and hereinafter more fully described.

On the drawings: Figure 1 is a plan view showing a device embodying this invention.

Figure 2 is a front elevational view of the same showing a fragment of the base rej moved.

Figure 3 is an enlarged horizontal section with parts omitted taken the line III-III of Figure 2.

Figure 4 is a side elevational View of the device. a i

Figure 5 is a fragmentary 'elevational view with parts omitted'showing the graduated scale by which to adjust thedevice. M Figure 6 is a horizontal s'ectionsimilar to Figure 3 of a modified forn'i-of thedevice.

Figure7gis a fragmentary view similar to Figure5 showingthe scale and appurtenances 1 therefor of the modified formcof the device.

Figure 8 is a detail horizontal fragmentary section with parts omitted taken at the 7 line VIII'V'III of Figure 7.

' Figure 9 is a section similar to Figure 8 showing a'modified form of the mirror adjusting handle. Figure 10 is a front'perspective viewof the device with parts removed.

; Figure 11 isa view of'the device of Figure l0showing in addition the cover for protecting the device when being transported.

Figure 12 is a perspective viewsimilar to Figure l0 of the modified form of the device. a' horizontal section of-which was shown .in Figure 6.

Figure 13 is a perspective view of the de- 1925. Serial No. 44,734.

vice of Figure 12 showing in addition the cover therefor.

Figure 14 is a plan view of a design reflected by the device when the two mirrors are placed at an angle of 90 apart.

'Figure 15'is a plan view of a design re flected bythe device when the two mirrors therein are placed at an angle of 7 2 apart.

Figure 18 is a plan view showing the held of the device when the mirrors thereof are placed at an angle of apart.

Figure 19 is a plan View of the field of Figure 18showing in addition a design reflected therein.

Figure 20 is a detailplan viewv with parts omitted showing the element from which the design of Figure 19 was reflected. As shown on the drawings:

:Referring to Figure 1 there is shown a rectangular flat base 1 on whichis mounted a flat circular support 2. The support 2 has alight colored surface on the upper side thereof. A pairof radially extending brackets 3 secured at adjacent corners of the base 1 extend inwardly toward the center of the ing hollowcylindrical portion 5 and an adjustablescrew 6 at .the ledge of said I portion for removably and adjustably holding a cas ing'7. Thecasing 7 has substantially a triangular cross section as viewed in Figure 3 and has a smaller portion Son the lower end thereof which extends through the clamp 4. \Vhen the casing is desired to be transported without the base, the portion 8 is adapted to receive thereovera cover 9.

The casing 7 is constructed of an opaque material such as card board and the like and has mounted therein a pair of rectangular flat mirrors 10 and 11 having their reflecting surfaces facing each other and their edges at one side thereof in juxtaposedrelation with each other in the apex of the casing 7. One of the mirrors 10 and 11 is adapted to pivot about the other of said mirrors to form a variable, angle therewith between the surfaces of said mirrors. An arcuate spring 12 is mounted In said casing and has one end upper and lower ends otthecasing, said edge eXtending intothe easing as far as the edges 01 the mirrors 10 and 11. '1, he portion of the casing below the edge 14 is removed. A graduated scalelfi is provided alongthe edge 14, the scale readin in angular degrees to indicate the angulari ty oi the mirrors 1Q and 11 and to permit an adjustment thereof to an'ydesired degree ofangularity.

In themodificationshown in Figures 6, 7, S, .12 and 13 the vertical surface of the casing 7 opposite the apex thereof is semi-cylindrical instead 01 Ha t as in the previous embodiment. In thisnmdilication the spring 12 andnielnher 13 thereon are dispensed with and the inner surhice oi? the casing? oppositejthe apex thereol comes practically to the I forward edges of the mirrors and 11. The scale 15 is provided at the lower edge of the upper portion of the casing 7 instead o'f-at the edge 1 .1; and thecasing at said scale has ahorizontally extending slot 16 therein. The slot 16 tormsa guide fora pin 17. The pin 1'1 extends outwardly from therertical edge 01 the mirror 11Qand clamped thereto, by a amp 18. A spring 1 9 surrounds the pin 17 within the casing and abuts a washer 20 also on said pin ;l.orpres sing the latter against the inner edges of the slot 16. i

1 1n the modification shown in Figure 9 the pin 17 does not/extend so far out 01' the slot 16 an d hasa tubular mel'uber 21 surrounding the outer end thereof and coaxial therewith. The member 21 has integral therewith on the inner end thereof a flange 22 which takes the I place of} the washer 20,311 the previous embodiment. ,In this latter embodiment the tube :21 functions as a handle andanay be pressed inwardly to release theftriction caused by the spring 19 between the flange 22 and the inner edgeof the slot- 16. ln the modificatjon shown in Figure 8' the "friction between the washer20 and the inner edge of the slot 16 cam'iot heja llei 'iated while moving the mirror11 to adjusted position. .It willbe seen lit reference to Figureil' that the pin 17 or the tube 21. as the case maybe, may be used asan indicator in conjunction with the scale 15 in adjusting and determining the angular position of the{ mirror 11 withlrcspect to the mirror 10 i i I .he top otthei casing 7 isprovided with aperture 2 3is positioned as near as practicableat the apex of the caslng 7 and has sides which are s1 ibst antially parallel, to Y the sides of said top. The aperture 23 ai iayptake any shape, however. In Figure 1 1 is shown a .tield as view d through the aperture 23 when .thegn'iirrors.10 and 11 are placed .atan angle as in theembodiment shown in Figure 12.

'Ihe-mirrors 10 and 11 will reflect and r ercfiect the line cul when the embodiment shown in Figure 1 used so that it appears in every (ninth-ant forming square chad. JVhen the embodiment shown ,in' Figure 12 ,is used the squa (6601i will not occur butinsteadthereof the designwill be outlined by the circle dial. .iissuming that a bisecting liue G]t ,l)6 drawn on the object support 2 when the mirrors l0 .and 11 are in the position of the angle (Le j,

and assumingthe arc flay be struck and the lines /11, and M be drawn, these lines and are will be reflected in every quadrant and'a design as shown within thesquare dbccl excluding the lines ac and 0d will appear through aperture 23. v i

I N ow suppose that the angle, between the mirrors 10 and 11bc adjusted toGOi and the device be positioned odor-support 2 with the n'iirrors occupying the angled of (Z' of Figure 15 and hisecting line 0 It line ffhfland line lz/ he drawin a designwill,appear in which the atorenientioned lines will reappear in a corresponding position in. OV91' V'-G0Q; sector. The outline of the design will-be the polygon of which a (l is one side it the embodiment of Figure 10 is used andthe outline will be the circle of which/i (Z is a portion if the embodiment 01 ;F igure 12 is used. The heayyyblaclt lines for example a of and b (l will not form a part of th is fdesign.but in this case as before they merely represent theintersections of the various planeso't' reflection.

In Figure 16 assum ingthemirrors tonecupy t-he position of (1,. c J, the angle between the mirrors being in this case" 4t5 and the portion of the design shown between the angle a" e (l. excluding thelarge circle audthe outer polygon, be iplacod in saidangle, a complete design as shown wilLreSult. In Figure 17 is shown a design obtainable when the mirrors are placed in tho position (1/7 WTd' of.72. In this case asibefore the J poly-gr m represents the outline if one embodiment is used and the outer circle represents the outline of the design if the other embodip lnlent used. Inthis case the lines inthe an aperture 23 extending therethrough. The

,symmetrically positioned in the other 72 sectors, but the full black lines as before merely represent intersections of the various planes of reflection.

In Figure 18 is shown a field as would appear when looking through the aperture 23 of the embodiment shown in Figure 12 when the mirrors are adjusted to an angle of 15, the black lines representing intersections of the various planes of reflection. Now assuming that the mirrors are in the position of soy z on Figure 18 and a piece of string is placed on the support 2 to occupy the relative position shown in Figure 20 within the angle m z z, a design will result through the reflections and rerefiections in the mirrors such as appears in Figure 19, the image of the string as shown in Figure 20 within the angle myz occurring in the design as shown in Figure 19 eight times in a group of four pairs, each pair consisting of an inverted image and an erect image of said string. a

It will be obvious that this device may be used to great advantage by people in various occupationsbs for instance artists, designers of lace, etc. i

We are aware that many changes may be made, and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and we therefore do not purpose limiting the patent granted hereon, otherwise than necessitated by the prior art.

We claim as our invention:

1. The combination with a casing having angular-1y related walls and an arcuate wall, a stationary mirror associated with one of the angularly related walls, a movable mirror pivotally associated with said stationary mirror, means secured to said movable mirror said means projecting through a slot in the areuate wall whereby said mirror is adjusted, and yielding means associated with said projecting means within the casing to maintain said mirror in any desired position.

2. The combination with a casing having angularly related walls and an arcuate wall, a stationary mirror associated with one of the angularly related walls, a movable mirror pivotally associated with said stationary mirror, means secured to saidmovable mirror, said means projecting through a slot in the arcuate wall whereby said mirror is adjusted, yielding means associated with said projecting means within the casing to maintain said mirror in any desired position, and indicating means associated with the slot in said areuate wall to render said movable mirror adjustable to any predetermined angle.

3. The combination with a casing having angularly related walls and an areuate wall, a stationary mirror associated with one of the angular-1y related walls, a movable mirror pivotally associated with said stationary mirror, means secured to said movable mirror, said means projecting through a slot in the arcuate wall whereby said mirror is adjusted, and yielding means associated with said projecting means within the casing to maintain said mirror in any desired position, said yielding means comprising a helical spring interposed between said movable mirror and arcuate wall.

In testimony whereof we have subscribed our names.

STUART v. DAWSON. JOHN GILBERT WILKINS. EDWARD H. DAWSON. I

hereunto 

